Upon rendering an image in Blender 2.32 I get
horizontal artifacts and what looks to be partial
transparency on a uv mapped procedural texture. I
have checked this in 2.31a, 2.30, 2.26 and 2.3 and
the problem does not exist on any of them using the
same .blend file.

I have put up a page with sample renders done with
different combinations of OSA values, the unified
renderer on and off, and the render done in a
previous version for reference; there also can be
found the subject .blend file: